World: r3wp

GET gives you the value of a word.  


the detail being that the word may or not be bound.  when it isn't 
bound explicitely, it will search for it in the global context (explicitely 
if you give it a lit-word).


which is why its always a good idea to use GUI code within a context, 
so you can be sure any un-explicit binding is local to that context. 
 note that you must explicitely create them within the context (at 
the root level of the context) for that binding to occur.


(note to Lad & Brian..I know I'm over-simplifying the whole concept, 
but that is how basically it works for "mere mortal"  ;-)

ex: 
here .... danger!   [a b c] use isn't bound within the context.

context [
	layout [a: field b: field c: field]

	fields: [a b c]
	foreach field fields [
		set-face get field to-string now
	]
]





while this will be (and protect your global context from being clobbered 
by the field names), plus you are sure that GET will try to use the 
field names locally.

context [
	a: b: c: none

	layout [a: field b: field c: field]

	fields: [a b c]
	foreach field fields [
		set-face get field to-string now
	]
]



if you really wanted to be funky, you could put words in the [a b 
c] block which are bound to other contexts using 'IN.

append fields [] IN other-context 'd


then when the loop runs, the field specified by d in that OTHER context 
will also be set.

hehe... that seems like it was a "Binding 101" tutorial   hehehe

That helps...I think. thanks

using the above tricks you can make system-wide intialisation functions:


here is a cool previous login detection system which fills up your 
whole gui based on stored data in a database.

	

; supply contexts, view controls set into them and the data to set 
into.
setup-all-gui: func [
	spec 
	/local ctx control controls data i
][
	foreach [ctx controls data] spec [
		repeat i length? controls [
			control: get in ctx controls/:i
			set-face control data/:i
		]
	]		
]
	
; reload previous session
either all [

 main-data: get-sql-last-main-data  ; returns [ "project" "module"]

 login-data: get-sql-last-login    ; returns ["user" "encrypted" "server.com"]
][
	setup-all-gui reduce [
		main-gui [proj-fld mod-fld] main-data  
		login-gui [login-fld passwd-fld server-fld] login-data
	]
][

 print "This is the first time you use application, user-setup will 
 now be called."
	setup-user
]

is it not possible to capture ctrl+tab?

no ... that is my old-time complaint ... ctrl tab is needed to swithc 
between tabs ....

ok, thanks

http://www.rebol.com/downloads/v277/viewpro-277-agg-fix1.exe

are there known problems with RATE inside a DETECT? when I use it, 
EVENT/TIME is fired constantly, even if I set rate to something like 
0:0:10.

whoops, I meant event/type = 'time, not event/time.

you need to do a show of the face to have the rate taken in account.

here is how it works..... I had to stumble upon this within GLASS.


when you add a rate to a face, actually, the timer will trigger 30 
times a second, no matter what your rate is.

do event

will filter the events based on what your rates are set up.

because detect is part of the wake-event system, it gets all the 
events from the input stream, so you end up with all time events.

it was done this way so view can share the same time event among 
many faces, internally.

ok, I see.

It took me quite a while to figure out what I called "Time event 
madness"  ;-)

ok, the "do event" thing? when do I apply that?

that managed within the do-event of wake-events.


the fact that  detect is called, means do event was called.  whenever 
a detect returns false, it consumes the event and subfaces do not 
get their events (even time IIRC).

sorry...  "that managed within the do-event of wake-events"  should 
read

that's managed within view's port wake-event

IIRC the corrected time event is kept by engage, not detect.

exactly.

ok, I've added a delay handler, but it seems a bit wasteful to do 
it this way.

use engage not detect to trap the time event accordingly with the 
rate

and after changing the rate of a face you need to issue immedialty 
a SHOW on the face

hmm...

using detect slow down your app, avoid it if you can

detect should only be used to trap events to sub-faces.   as Steeve 
notes, engage is where you should really be handling the events.

I'm messing around in the detect function for the main window.

aaahhhh lots of "fun" isn't it   ;-P

you might be better of using an input even handler, its faster cause 
it proceeds at the very start of do events... before it starts looking 
at faces within panes.

seems that engage has no effect. so you are not supposed to be able 
to use engage and detect at the same time in the same face?

it depends what you return from detect.  if you return none, it consumes 
the event, if you return the event, then engage is called.

that's how its supposed to work, AFAIK.

I return the event, yet nothing happens. Oh, well, I've studied RebGUI 
code and it does the same thing as I do.

strange.

what are you trying to achieve?

I just want a delay before displaying a tool-tip anywhere in the 
window.

you do know that the window feel is replaced everytime it is viewed?

yes, I take care of that just fine. I've made plenty of modifications 
to the detect function for window already.

ok, just reminding you,  its bitten me in the arse a few times, even 
if I know about it  ;-)

yes, it's not easy, however everything is working as expected, except 
for time events and the use of engage.

its possible the window cannot have time events, no matter its rate. 
 try using a master face in which you put everything, using its feel 
instead.


the window is managed differently than other faces by view... it 
has its own events like resize and stuff, so I wouldn't be surprised 
that its time handling is different.

(I meant, support for time events in its engage)

yes - iirc window does handle time differently and you should always 
use a master face

Posted this in the OSX group, but it's private:


View bug: When getting a timer event in a DETECT feel, event/offset 
is 0x0 in OSX. In Win32 the event/offset during a timer event is 
correct. Can anyone confirm this under Linux?

f: make face [
	size: 200x200
	rate: 2
	offset: 100x100
	color: red
	feel: make system/view/window-feel [
		detect: func [face event] [
			print [event/type event/offset]
			event
		]
	]
]

view f

In View 2.7.7.4.2 in linux, the event/offset is set correctly when 
I mouse over the window.

This is a bit confusing.... I get 'move events on a click, where 
I should get 'down. This occurs inside an insert-event-func function.

yep.  rebol adds some move events when other events are generated. 
 you get them on mouse, window activation, and some others I don't 
remember.


its VERY annoying, though.  I think "do event" consumes some of them, 
but some go through and end-up within feel/engage anyways.

I've been battling these "stray" events for years.  :-(

I used to filter them in my own insert-event-func handlers

found a way to brute force it. not pretty, though...